发明名称 |
Process for recovering calcium compounds and sulphur dioxide from calcium sulphate, and calcium compounds and sulphur dioxide obtained according to this process. |
摘要 |
<p>Calcium sulphate is decomposed at elevated temperature and in the presence of a carbon source into a calcium compound and sulphur dioxide. As starting material calciumsulphate anhydrite is used, which is obtained by recrystallizing crude phosphogypsum with H2SO4 at a concentration of 20-65 wt.-% H2SO4, at 20-90 DEG C for 5-180 minutes. Pure products can be obtained from crude gypsum in a very simple manner.</p> |
申请公布号 |
EP0041761(A1) |
申请公布日期 |
1981.12.16 |
申请号 |
EP19810200618 |
申请日期 |
1981.06.04 |
申请人 |
STAMICARBON B.V. |
发明人 |
WETERINGS, CORNELIS ANTONIUS M. |
分类号 |
C01B17/50;C01F11/08;C01F11/46;(IPC1-7):01B17/50;04B11/02 |
主分类号 |
C01B17/50 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|